LumberJocks

Longworth Lathe Chuck

  • Advertise with us
Project by Ger21 posted 1579 days ago 11079 views 40 times favorited 32 comments Add to Favorites Watch

Stumbled across some pics of these about 2 weeks ago, and thought it would be cool to make one. CNC makes routing the slots pretty painless. I routed a pocket for a 1”-8 hex nut, and epoxied it in place. Back and hub body are 3/4” baltic birch, and the front plate is 1/4” MDF. Only problem is that when epoxying the nut in, its a bit tricky (nearly impossible) to get the nut perfectly perpendicular to the face. I fixed that by building a jig and surfacing the face with a router while it was spinning on the lathe. I’ve figured out how to correct this for the next one.

Anyway, it actually works pretty good. Here’s a video of it spinning a rough bowl.
http://www.youtube.com/watch?v=m-aNG2cl6Ds

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html





32 comments so far

View lew's profile

lew

9829 posts in 2256 days


#1 posted 1579 days ago

Wow, Gerry- THANK YOU!!!!!

I have been looking for something like this for a long time. The chuck I made has straight slots and is constantly releasing the work as it spins. This will solve that problem. Off to the shop!!

Lew

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View stefang's profile

stefang

11820 posts in 1835 days


#2 posted 1579 days ago

Hey Gerry. I like this chuck. It looks really flexible because it adjusts to any size. The only thing I wonder about (and this is not a sly way to criticize) is about getting the workpiece properly centered. I suppose you could just deduct the diameter of your bowl from the diameter of the chuck, but I’m thinking about getting all those handles tightened in an accurate position. How do you do it?

-- Mike, an American living in Norway.

View Ger21's profile

Ger21

600 posts in 1632 days


#3 posted 1579 days ago

It’s self centering. the slots on the front and back go in different direction, so as you turn the discs, the stops move in and out. Google Longworth Chuck and you’ll find more info.

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html

View DaleM's profile

DaleM

864 posts in 1884 days


#4 posted 1579 days ago

Wow, I didn’t even notice the slots went the other way until your reply to Mike. Now I see why you made a front piece and back piece. I thought it was just layers. That’s really cool.

-- Dale Manning, Carthage, NY

View stefang's profile

stefang

11820 posts in 1835 days


#5 posted 1579 days ago

Thanks much Gerry. Self centering is good.

-- Mike, an American living in Norway.

View stefang's profile

stefang

11820 posts in 1835 days


#6 posted 1579 days ago

Hey Gerry I searched the net for Longworth lathe chuck plans and it’s been chemically rinsed of any actual plans that I could find. I did find a list of materials needed and some construction instructions but only one outline drawing of the outside of the faceplate. Have you a specific source for plans? Thanks for any help.

-- Mike, an American living in Norway.

View lew's profile

lew

9829 posts in 2256 days


#7 posted 1579 days ago

Found this site that has some construction information.

Lew

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View Ger21's profile

Ger21

600 posts in 1632 days


#8 posted 1579 days ago

That’s where I got some of my info from, including the idea to use the nut, rather than a faceplate. Much cheaper. I wish he’d shown how he mounted the nut, though. I didn’t want mine to blow apart, so I used a 2-5/8” diameter hub. This limits me to holding a 3” part inside the jaws, and about 5” on the outside. His looks like it goes a lot smaller.

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html

View Bob #2's profile

Bob #2

3808 posts in 2522 days


#9 posted 1579 days ago

The lathe is turning the wrong way.
It should turn toward you unless you are really small and can shimmy in againt the wall. <g>
It looks to me like you have your “bowl chucker” mounted on the wrong side of the slots

Oh, and the bowl is not centered so if you do decide to tool it you are going to end up perforating it or having an out of round edge at least.

Regards

Bob

-- A mind, like a home, is furnished by its owner

View rustedknuckles's profile

rustedknuckles

160 posts in 2252 days


#10 posted 1579 days ago

I built one of those a few years ago, it works great.

-- Dave- New Brunswick

View toyguy's profile

toyguy

1353 posts in 2338 days


#11 posted 1579 days ago

I have looked at these a dozen time on the net…. But for the first time i see that the slots run in different directions to make this self centering…...... I guess I need to look at things like this a bit closer…. Duh !!!!

-- Brian, Ontario Canada,

View Ger21's profile

Ger21

600 posts in 1632 days


#12 posted 1579 days ago

Bob, the headstock on my lathe is turned around away from the bed. I inadvertently made the chuck too big, so had to turn the headstock around to mount it.

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html

View Ger21's profile

Ger21

600 posts in 1632 days


#13 posted 1579 days ago

And the “bowl” is solid, and is actually not really round. I rough turned it when it was wet, and it’s been lying in the garage for several months. I wasn’t actually able to finish turning it, as the spalting is too soft.

-- Gerry, http://home.comcast.net/~cncwoodworker/CNC_Woodworker.html

View stefang's profile

stefang

11820 posts in 1835 days


#14 posted 1579 days ago

Thanks a load Lew and Gerry. I went to the article. I am definitely going to make one soon as possible. I have the materials I need already. I just need to get the hardware.

-- Mike, an American living in Norway.

View Bob #2's profile

Bob #2

3808 posts in 2522 days


#15 posted 1579 days ago

Ger21
“I wasn’t actually able to finish turning it, as the spalting is too soft”
I wondered about that too.

The problem here is that with 14,000 “inerested viewers that if you don’t clarify these things on your post it is possible that an unknowiing beginner will copy exaclty what he sees in the pictures.

Regards

Bob

-- A mind, like a home, is furnished by its owner

showing 1 through 15 of 32 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase